John james hall



(No Model.)

J. J. HALL.

TELEGRAPH CABLE.

No. 000,073. Patented Mar. 1, 1898.

witnesses lzuij'ziir attorneys.

YHE NORRIS PETERS c0 wow-mac" snmamu. n c.

UNITED STATES PATENT OFFICE.

JOHN JAMES HALL, OF SLOUGI-I, ENGLAND, ASSIGNOR TO GEORGE WVILSON DAWVES, OF LONDON, ENGLAND.

TELEG RAPH-CABLE.

SPECIFICATION forming part of Letters Patent No. 600,073, dated March 1, 1898.

Application filed October 4, 1897. erial No. 654,077. (No model.)

To aZZ whom it may concern: circulation of air is obtained, and, if desired, Be it known that I, JOHN J AMES HALL, endry air may be driven through the cable in gineer, a subject of the Queen of Great Britorder to remove any moisture which may obain, residing at Observatory Cottage, Datchet tain access to the conductors. 55 Road, Slough, Bucks, England, haveinvented Referring to the accompanying drawings, certain new and useful Improvements in Tele- Figure 1 is a side elevation of a short length graph-Cables or the Like, of which the followof lead-covered air-space cable according to ing is a specification. the present invention. Fig. 2 is a View, on'

Thisinventionrelatestotelegraph-cables or a greatly-enlarged scale, of one of the con- 60 to the like, (other than deep-sea cables)-such, ductors or wires (with its covering of leno or for instance, as are known as lead-covered netted fabric) removed from the cable. Fig. air-space cables for telephones and tele- 3 is a cross-section on line 3 3, Fig. 1.

graphs for land-lines. For long-distance A A are the copper wires or conductors. working it is desirable to have cables with as B is the leno or netted fabric by which 65 low induction as possible; and the primary each wire A is individually covered, as aforeobject of the present invention is to increase said. the air-space in such lead-covered cables, and O is a yarn or textile thread by which the this is effected as follows: covering B is secured on its wire A. (See The wires or conductors in the cable are, Fig. 2.) I 7o according to the present invention, each spe- D is a stouter textile thread or string by cially and separately inclosed or covered in which thewhole bundle of such covered wires any suitable manner by an envelop or coverare tied together. ing of open-work or very porous or perforated E is the conduit, consisting in the case illusmaterial, advantageously a woven or netted trated of a round lead pipe. 75 fabricsuch,for instance, as a textile of the Having thus described the nature of my incharacterknown aslenoormuslin. This vention, what I claim as new, and desire to material (netted fabric) is mounted on or secure by Letters Patent of the United States, around each wire or conductor in any suitable is mannerforinstance, rolled around each said 1. An electric-telegraph cable composed of 8o Wire, respectively, and each such wrapper sea plurality of conductors each provided with cured to its wire in any suitable ma11nerf0r a wrapping of a netted textile fabric secured instance, by a fibrous thread or yarn wound thereon bya spirally-wound textile thread or spirally around the outside of same, or said yarn,the said conductors being laid in abunch material may be wound or twisted spirally in the form of a cable, and a textile cord 35 on each said Wire. A large number of these wound spirally around the whole, substanseparate wires or conductors, each thus indetially as described. pendently covered or protected with its in- 2. Anelectric-telegraph cable composed of dividual covering of leno or the like-for ina plurality of conductors each provided with stance, one hundred, more or less, of these cova loose wrapping of a netted textile fabric; a 4o ered wires-are then (in a bundle) placed in a thread or yarn of textile material wound spipipe or tube of lead or the like conduit, and rally upon said wrapping; the said conducalthough thus all laid together the wires or tors being laid together in the form of a caconductors are perfectly insulated by the ble, and a textile cord wound spirally around aforesaid separate coverings of leno or the the whole; and a soft metallic casing sepa- 5 like fabric, and no amount of compression to rately inclosing the said bunch of conductors,

which they would be put or be liable either substantially as described. in building up the cable or in use will place 7 T i the wires in metallic contact. JOEL JAMES HALL By this invention considerable air-space is lVitnesses: 5o securedandinductionwillbegreatlyreduced. ALFRED NUTTING,

Furthermore, by this invention freedom of H. ADAMS. 

